Electric fan.



No. 680,120. Patented Aug. 6, [90L E. W. BROWN.

ELECTRIC FAN.

(Application filed Nov. 8, 1900.)

(No Model.)

WITNESSES:

v INVENTOH B; i\ i Patented Aug. 6,1901.

E. W. BROWN.

ELECTRIC FAN.

(Application filed 310v. s, 1900. (No Model.) 2 Sheets-Sheet 2.

i E l E .5

/ v VENTOf? WITNESSES 5 a. BY m NITED STAT-Es PATENT since.

ELECTRIC FAN.

SPECIFICATION forming part of Letters Patent No. 680.120, dated August6, 1901.

Application filed November 8 1900. Serial No. 35,807. (No model.)

To aZZ whom it may concern.-

Beit known that I, EDGAR W. Baowmacith zen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvementsin Electric Fans; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to new and useful improvements in electric fans,and comprises means combined with an electric motor (either analternating or direct current motor) for distributing the currents ofair generated by the fan-blades.

There are two kinds of electric fans in general use for keeping the airof a room in airculation. These are known in the art as ceiling-fans andbuzz-fans. Comparing two motors of the above types taking the.

same amount of current and giving out the same power, one of them-towit, the ceilingfan motor -will run at about an average of one hundredand sixty revolutions per minute, and the otherto wit, the buzz-fan m0-tor -will run at about an average of sixteen hundred revolutions perminute. In the highspeed motor the proportion of wire and iron used inits construction will be very small in comparison with that used in thelow-speed motor. p 1 g It is the object of the present invention toadapta high-speed motor to the purposes of a ceiling-fan and to enablethe use of fanblades of comparatively small dimensions.

Ceiling-fans of the ordinary type are suspended from the ceiling byatube at a'height of about eight feet from the floor and have usuallyfrom two to four fan-blades, which are run at a comparatively low rateof one hundred and sixty revolutions per minute. The fan-blades usuallyhave a sweep varying from forty-eight to seventy-two inches. In otherwords, this is the distance from the tip of one blade'to the tip of theopposite blade. The blades are set so that the air is drawn down fromabove'the fan and is forced directly toward the floor. The air thenspreads out over drawn down by the revolving blades.

the floor until the walls are reached, when it ascends said walls to theceiling and is again It will be seen that there is a column of airdescending to the floor the diameter of which is equal to the spread ofthe blades. The following are the principal disadvantages known to existin the ordinary ceiling-fan, as above described. 'For example, there areonly places where a person can obtain the benefit of the breeze. One isa position directly under the fan, where the breeze will be thrown downon the head of the person, and the'other place is close to the wall,where the air ascends to the ceiling; The dirt-0f the street is carriedin on the shoes of persons'entering stores, restaurants, and otherpublic places where these fans are used, and where it falls off onto thefloor and becomes dust. The ceiling fan whiclr throws the air to thefloor stirs up this dust and difiuses it throughout the room greatly tothe detriment of the health ofpersons who have to breathe such air. Bythe use of the air-deflector hereinafter described,

the air may be thrown downwardly and outwardly, according to the extentof curvature given the deflector. For example, the greater the curvatureof the deflector the greater will be the spread of radiation of airgenerated by the fan-blades. In other words,by curving the deflectoroutward sufficiently the air is spread outwardly 'to such an extent asto avoid stri-k. ing the floor, but will be directed against the lowersides of the walls. Therefore persons in all parts of the room theyreceive the benefit of pure currents of air. Another objection met within the use of the ordinary ceiling-fan is the liability of the largefan-blades becoming broken by being struck by objects carried throughthe room-such, for example, as a step-ladder. Striking the blades withsuch objects not only damages the blades, but often throws the fan outof balance and makes it liable to jump 0d the hook by which it issuspended. In the present invention the deflector is projected outbeyond the ends of the fan-blades, and thus affords a protection tothem. i

The means for obtaining the advantages hereinbefore described, as wellas other new and useful features of the invention, will appear from adetailed description of the inven- 3 is a top plan view of the motorwith the fanblades and reflector removed; Fig. 4, a crosssectional viewof the motor with-the reflector broken away and one of the fan-bladesre-- moved. Figs. 5 and 6 are detail views showing the manner ofsecuring the curved arms to the motor and the manner of securing thedeflector in position. 1

In the drawings '1 have shown a motor of thealternating-current-induction type, the

accompanying armature A of which is mounted on a hub 13 hub B'extendsupwardly mam form of a and is-s urrounded by 'a field-magnet O. The isleeve B and provides a supportfor the fanblades D. The said blades areattached .to'a spider'E, which has a threaded projection E that screwsinto the sleeve B of the hub B.

F designates the motor-shaft, which is 5 forced into the lower part ofthe sleeve B, and thus the said sleeveB and hub B become a support forthe fan-bladesand the armature, the'armature Abeing snpportedon-the 1shaft F through month."

ing G" of antifriction metal. This bushing forms'a bearing for the shaftF, which it surrounds.

. H designates a hardened screw, whic h penetrates an opening. in thecenter of the motor- I case and provides 'a seat for anantifrictionbearing, consisting of a single which the shaft F has itsbearing.

,ball I, upon 1 for that purpose. This oil-reservoir being in a portionof the-casing is therefore stationary. Oil will find its way by themotor-shaftF to the bottom of thebearing, and will be confined withinthe hearing by a leaden washer P, which istightly pressed against thelower end G of the extension G by a screwH,-which, as before stated,provides a bearing for the ball.

The field-magnet Oisconstrncted of laminated iron and is attached to themotor-case G by means of bolts J.

K designates an air-deflector of sheet metal I or any other suitablematerial. A This defiec tor maybe shaped in-any desirable form, havingin view the direction ordirections in which it is desired to deflect ordistribute the air generated by the fan-blades. This deflector isconcentric to the shaft of the motor and is placed in any desirableposition with reference to the motor. shown it attached as follows,although there may be other ways of attaching the same:

L designates tubular arms which areconnected to the motor-case and holdthe deflector in position by means of oblong plates a.

These plates are attached by screws a, which In the drawings I havevsconce penetrate the ends thereof and the deflector and screwinto themotor-case. Each of said plates has a screw-threaded projection b, bywhich said plates are screwed onto the arms L before said plates areattached to the motor. The other ends of the arms L screw intopending-tube N to the motor, the saidwires being thus brought out of theway of the fanblades inconnecting them to the motor. It has not beendeemed necessary -to illustrate these connecting-wires in the drawings,as

4 they. are features wellknown.

.Itwill be readily seen that the deflector may beoonstructed in a numberof'ornamental designs, and, further, owing to its forming a cover forthemotor much of the expensive and ornamental work usually expended onfan-motors may be dispensed with and the expense of construction of suchmo tors materially lessened.

The present fan is not limited to ah'attacln 5 mentto the-ceiling. I Itmay be mounted on G designates a motor-case havingacentral tubularextensionG",which surrounds a bush-- a column extending from the flooror placed upon a suitable stand or base and used upon a; deskor table,thus taking the place'of a buzz-fan with the. following advantages: The

' air will radiate'from the fan to all sides of the table, thus givingpersons the benefit of air in all directions, whil'ethe' buzzfan willthrow the air in'; one direction only. Iclaim- Y 1. In an electric fan,the combination with an electric-motor, anda suspending-tube, of

Ice

an air-deflector surrounding saidmotor, arms connecting the motor withthe suspending-- tube, and common means forg'connecting the gravity downalong tially as specified. I v

2. In an electrician, the combination with an electric motor, of anair-deflector-secured arms and the'deflectorto theiinotcr, substanthedepending rod, substantially as specified. '3. In an'electric fan, thecombinationwith a motor and lfan-blades driven thereby, of a.stationaryair.-defiector inclosing said motor,-

the smaller part of saiddefleetor being closer tothe fanbla des thantheilarger part there= of, the deflecting-surface of said deflector be Qing curved inwardly so that the air deflected thereby from its originaldirection will he do flected less abruptly than if the said deflectingsurface was straight, and whereby a greater volnme of air is directedfrom the deflector.-

4. In an electrician, the combination with an electric motor, ofanair-defiector inclosing said motor and secured, thereto, a series oftubular arms-by means of which said deflector and motor are connected toa snspending tube,

the said tubular arm also providing means whereby the conducting wirespassing through the suspending-tube are enabled to be connected withthe-motor free from any interference with the fan blades, snbstam:tially as specified.

5. In an electric fan, the combination with a motor and asuspending-tube theref0r, ofa stationary air-deflector inclosing saidmotor,

, the shaftofsaid motor being projected through an openingin saiddeflector,fan-blades mountv .in presence. of two witnesses,

ed on said Shaft above said. deflector, whereby thefmotor, fan-blades,and deflector-are brought into a compact relation, substantially asshown. and; described. In't estimony whereof v Iaffixmy signature EDG Rw. BROWN. Witnesses:

R. J. 'MCCARTY, J. A. WORTMAN.

